# OpenDisplay vs One Big Keyboard

The clearest difference is in-app purchases: OpenDisplay at none against One Big Keyboard's 1. OpenDisplay also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. One Big Keyboard sells 1 one-off in-app purchase. OpenDisplay asks for nothing beyond the download.

## The numbers

| Metric | OpenDisplay | One Big Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (23 ratings)](https://appshunter.io/ios/app/opendisplay/id6780264891/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 92.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | — |
| Monetization | Free | — |
| Size | 1 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Philip Poloczek](https://appshunter.io/developer/1333036183) | [Hello Good Day LLC](https://appshunter.io/developer/1720039558) |

## What reviewers say

### OpenDisplay

[App page](https://appshunter.io/ios/app/opendisplay/id6780264891)

Transform your iPhone or iPad into a genuine second display for your Mac. This open-source solution allows you to extend your screen space for multitasking, keeping important information visible. Connect via USB for minimal latency or Wi-Fi for easy setup.

**Highlights:** Real extended display functionality, USB and Wi-Fi connectivity, Retina-sharp rendering, Touch and scroll support, Portrait and landscape orientation, Private by design, no tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### One Big Keyboard

[App page](https://appshunter.io/ios/app/one-big-keyboard-operators/id6801952736)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Big Keyboard Pro | $4.99 | one-time |


## Frequently asked questions

### Is OpenDisplay free?

OpenDisplay is free to download, with no in-app purchases.

### Is One Big Keyboard free?

One Big Keyboard is free to download, with in-app purchases available.

### Do OpenDisplay or One Big Keyboard have ads?

Neither OpenDisplay nor One Big Keyboard shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*